5,10-二羥基-2,2-二甲基-12-(3-甲基丁-2-烯-1-基)-2H,6H-吡喃并[3,2-b]占噸-6-酮 5,10-dihydroxy-2,2-dimethyl-12-(3-methylbut-2-en-1-yl)-2H,6H-pyrano[3,2-b]xanthen-6-one

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